I had a few 6 pak scoops on my car, I made a taller version to allow for a taller induction, but I noticed that the mounting points were getting hammered & cracking the fiberglass, even with extra reinforcing underneath. At speeds of 145+mph, the wind was hard on that hood so I changed to a cowl. No more hood damage & we even gained 2mph & increased e.t by 0.02. I'm not going forward facing again.